108 lines
2.2 KiB
Go
108 lines
2.2 KiB
Go
package chroot
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import (
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"fmt"
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"github.com/mitchellh/multistep"
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"github.com/mitchellh/packer/packer"
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"io"
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"log"
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"os"
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"path/filepath"
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)
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// StepCopyFiles copies some files from the host into the chroot environment.
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//
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// Produces:
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// copy_files_cleanup CleanupFunc - A function to clean up the copied files
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// early.
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type StepCopyFiles struct {
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files []string
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}
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func (s *StepCopyFiles) Run(state map[string]interface{}) multistep.StepAction {
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config := state["config"].(*Config)
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mountPath := state["mount_path"].(string)
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ui := state["ui"].(packer.Ui)
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s.files = make([]string, 0, len(config.CopyFiles))
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if len(config.CopyFiles) > 0 {
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ui.Say("Copying files from host to chroot...")
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for _, path := range config.CopyFiles {
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ui.Message(path)
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chrootPath := filepath.Join(mountPath, path)
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log.Printf("Copying '%s' to '%s'", path, chrootPath)
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if err := s.copySingle(chrootPath, path); err != nil {
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err := fmt.Errorf("Error copying file: %s", err)
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state["error"] = err
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ui.Error(err.Error())
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return multistep.ActionHalt
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}
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s.files = append(s.files, chrootPath)
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}
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}
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state["copy_files_cleanup"] = s
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return multistep.ActionContinue
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}
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func (s *StepCopyFiles) Cleanup(state map[string]interface{}) {
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ui := state["ui"].(packer.Ui)
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if err := s.CleanupFunc(state); err != nil {
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ui.Error(err.Error())
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}
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}
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func (s *StepCopyFiles) CleanupFunc(map[string]interface{}) error {
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if s.files != nil {
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for _, file := range s.files {
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log.Printf("Removing: %s", file)
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if err := os.Remove(file); err != nil {
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return err
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}
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}
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}
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s.files = nil
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return nil
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}
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func (s *StepCopyFiles) copySingle(dst, src string) error {
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// Stat the src file so we can copy the mode later
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srcInfo, err := os.Stat(src)
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if err != nil {
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return err
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}
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// Remove any existing destination file
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if err := os.Remove(dst); err != nil {
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return err
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}
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// Copy the files
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srcF, err := os.Open(src)
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if err != nil {
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return err
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}
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defer srcF.Close()
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dstF, err := os.Create(dst)
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if err != nil {
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return err
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}
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defer dstF.Close()
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if _, err := io.Copy(dstF, srcF); err != nil {
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return err
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}
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dstF.Close()
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// Match the mode
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if err := os.Chmod(dst, srcInfo.Mode()); err != nil {
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return err
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}
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return nil
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}
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